Answer:
D. Granite
Granite would likely create the strongest and most stable slope.
Explanation:
The material strength on slopes may vary broadly. When we consider the material's strength ignoring the issues like fracture then the crystalline rocks such as granite, basalt, etc., are very strong. Sedimentary rocks like dolostone, most sand stones and some limestone are stronger than unconsolidated sediments and mud stones are quite weak.
The strength of unconsolidated sediments are usually lesser than the sedimentary rocks, as they have not been compressed and cemented with overlapping materials which gives strength to it.
